"""Test sphinx.roles"""

from unittest.mock import Mock

from docutils import nodes

from sphinx.roles import EmphasizedLiteral
from sphinx.testing.util import assert_node


def test_samp():
    emph_literal_role = EmphasizedLiteral()

    # normal case
    text = 'print 1+{variable}'
    ret, msg = emph_literal_role('samp', text, text, 0, Mock())
    assert_node(
        ret[0],
        [
            nodes.literal,
            (
                'print 1+',
                [nodes.emphasis, 'variable'],
            ),
        ],
    )
    assert msg == []

    # two emphasis items
    text = 'print {1}+{variable}'
    ret, msg = emph_literal_role('samp', text, text, 0, Mock())
    assert_node(
        ret[0],
        [
            nodes.literal,
            (
                'print ',
                [nodes.emphasis, '1'],
                '+',
                [nodes.emphasis, 'variable'],
            ),
        ],
    )
    assert msg == []

    # empty curly brace
    text = 'print 1+{}'
    ret, msg = emph_literal_role('samp', text, text, 0, Mock())
    assert_node(ret[0], [nodes.literal, 'print 1+{}'])
    assert msg == []

    # half-opened variable
    text = 'print 1+{variable'
    ret, msg = emph_literal_role('samp', text, text, 0, Mock())
    assert_node(ret[0], [nodes.literal, 'print 1+{variable'])
    assert msg == []

    # nested
    text = 'print 1+{{variable}}'
    ret, msg = emph_literal_role('samp', text, text, 0, Mock())
    assert_node(
        ret[0],
        [
            nodes.literal,
            (
                'print 1+',
                [nodes.emphasis, '{variable'],
                '}',
            ),
        ],
    )
    assert msg == []

    # emphasized item only
    text = '{variable}'
    ret, msg = emph_literal_role('samp', text, text, 0, Mock())
    assert_node(ret[0], [nodes.literal, nodes.emphasis, 'variable'])
    assert msg == []

    # escaping
    text = r'print 1+\{variable}'
    ret, msg = emph_literal_role('samp', text, text, 0, Mock())
    assert_node(ret[0], [nodes.literal, 'print 1+{variable}'])
    assert msg == []

    # escaping (2)
    text = r'print 1+\{{variable}\}'
    ret, msg = emph_literal_role('samp', text, text, 0, Mock())
    assert_node(
        ret[0],
        [
            nodes.literal,
            (
                'print 1+{',
                [nodes.emphasis, 'variable'],
                '}',
            ),
        ],
    )
    assert msg == []

    # escape a backslash
    text = r'print 1+\\{variable}'
    ret, msg = emph_literal_role('samp', text, text, 0, Mock())
    assert_node(
        ret[0],
        [
            nodes.literal,
            (
                'print 1+\\',
                [nodes.emphasis, 'variable'],
            ),
        ],
    )
    assert msg == []